No. The word "are" is present or future tense. The past tense would be "were".
You use the past tense form which is 'had'.
Is can be used in the past tense if it's in its past tense form, which is was.
"is' is present tense. For past tense use was or were.
I used the past tense to answer this question.
The past tense is involved.
'Who' is a pronoun, it doesn't have a past tense. But you can use the word "was" as in "who was on the phone?".
To say in the past tense, you would use the word "said."
Would is the past tense for will
You can use "had to" to express obligation in the past.
The past tense of "be" is "was/were." The present tense of "be" is "am/is/are."
Past - there is nothing like that to use grammatically, but the natural replacement is 'Was'. Future - will be.
No, the past tense is always put.